Derrick.



PATENTED SEPT. 29, 1903.

J. L. DE VOU.

DERRIGK.

APrLIoATIoN FILED Arx. 22, 1903.

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PATBNTBD SEPT. 29, 1903.-

J. L. DE VOU.

DERRICK.

APPLIOATION FILED un. 22, 190s.

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ivo. 759,955. Y

UNITED Y, STATES Patented September 29, 1903. i

VPATENT OFFICE.

JAMES it.Y DE vou, or 'wIssAHIcKorL PENNsYLvANTA.

DERRICK.

SPECIFICATION forming part of Letters Patent No. '7 39,955, dated September 29, 1903.

Application filed April 22, 1903.

To a/ZZ whom it .may concern:

Beit known that I, JAMES L. DE VoU, a resi-. dent of Wissahickon, in the county of Phila-` delphia and State of Pennsylvania, have in loads.y Its primary object is to provide im- 2 represents a plan view of the same.

proved means for automatically counterbal-- ancing the load by which the weight ofV the load regulates the action of the 'counterbah ance.

Further objects of the improvements are to attain iiexibility andsimplicity of construc-y tion andoperation, to provide for the ready assemblage and dissociation of the parts, and to permit the ready movem ent and adjustment of the mechanism to the position of the load. The nature and characteristic features of the improvements will more fullyxappear by reference to the following description and the accompanying drawings in illustration thereof, of which-h Figure 1 represents a side elevation of a derrick embodying the improvements. Fig. Fig; 3 represents a sectional view taken on the' line 3 3 of Fig. 1. Fig. trepresents a perspective detail view showing the swivel mechanism for supporting the base of the boom. Fig. 5 represents a perspective view of part of theshoe for holding the swivel -mechanism for the boom. Fig. 6 represents a perspective detail view showing mechanism for moving the counterbalance proportionately to the load. Fig. 7 represents a perspective view of the counterbalancing mechanism, and Fig. S represents a side elevation of a modified form of the construction. Y

As shown in the drawings, the car-frame 1 is provided with the rollers 2, upon which the derrick-base 3 is supported and moved, the frame having the flanges 1, which are engaged bythe iianges 3 of the base. The base 3 supports the mast 4, which comprises the struts 4L, v connected together by the compression members 4 and the tension members 4, the truss thus formed being connected with the pedestals 5 by the hinges @,which permit the mast to be broken and folded down. The mast holds at its top a bearing- Vthe holes 7c of this block.

Y carriedY byV the boom.

seriai No. 153,809. (No model.)

yoke 7, which is secured vto the struts 4 by the pivotal bearings 7d. The yoke carries the bearing-block 7 having the pivotal bearings 7, and the tie-rods 8, connected to the outer end of the boom 9, pass freely through Between the bearing-block 7 and the bearing-plate 10, fixed to the inner ends of the tie-rods S, are placed theY coiled springs 11, which take up the` stress upon the rods, these springs being .compressed proportionately to the stress in the rods,which move in proportion to the load Pivotally connected with these rods in any suitable manner, as by an arm 12, fixed to the plate 1 0, is a rocking lever 13, which is carried by the arbor or shaft 1l, supported by the bearings 14, carried by the mast. rlhis lever carries the rac-k 13, which engages and turns a pinion 15, fixed on a shaft 15, which is journaled in bearings 1G in the pedestals. Fixed on the revoluble shaft 15 are-the spools 17, about which are wound belts 18, connected with the counterweight 19 and passing over the pulleys 20. adapted to run on the rails 21, which are carried by the trussed beam 22, the beam having the pivotal connection 23 with the pedestal and the block-and-tackle connection 21 with the top of the mast. The boom 9 is provided with a universal movement by having its base pivotedto the swivel-block 25 through the pintles 25 and having the block connected by the pintles 25b with the shoe 26 eral parts thus being readily folded and brought down upon the car for shipment. rlhe load is lifted by the movable block 27 and the cable 2S, the latter being fixed to the outer end of the boom and passed over the block 27 and the pulley 29 to the drum 30, which is revolved by the dri ving-rod 31 of the engine 32. lVhen the load is thus hoisted, its component acting through the tierods 8 upon the springs 11 compresses these springs in proportion to the load, and the movement is multiplied and communicated to the counterpoise 19 to move it to the position on the The weight 19 has the rollers 19,

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beam 22 required for balancing the load, the movement of the counterpoise being eected by means of the intermediate mechanism, comprising the lever 13, the shaft 15, and the belts 18, operated by the movement of the tie-rods.

In the modified construction (shown in Fig. 8) the mast et is connected to the pedestal 5 by the hinges 6 and by the tie-rod 8 to the boom 9. The boom 9 has its swivel-block 25 connected with a movable bearing or piston 34, adapted to move in the way 0r cylinder 35, formed in or carried by the pedestal, the cylinder containing a medium, as the coiled spring 37, opposing an increasing resistance to the inward movement of the piston, the spring being supported bythe block or cylinder-head 3S. A beam 39, having its inner end connected to the pedestal and its outer end supported by a tie-rod 40, secured to the mast 4, carries the counterweight 42, which is connected to and moved by the piston 3i. The movement of the counterweig'ht to the position upon the beam required for balancing the load may be effected by communicating the movement of the piston, through the rack 43, connected therewith, to the pinion i-l, which drives the spool 45. A belt -16 is wound on this spool, passed over the pulley -17 carried by the beam and connected to the lug 48 of the counterweight. The block 3-1 to render its movement free is carried by the rollers if), journaled in the pedestal.

Having described my invention, I claim- 1. In a derrick or crane, a mast, a boom connected to said mast, a counter-beam connected to said mast, a counterweight movable on said beam, mechanism for supporting and permitting the movement of said boom proportionatelyto the weight supported thereby, a rack connected with and operated by the movement of said boem, a pinion connected with and operated by said rack, and mechanism connecting said pinion with said counterweight whereby said counterweight is moved, substantially as specified.

2. In a derrick or crane, mechanism for supporting the load, said mechanism comprising a spring adapted to be moved in proportion to the load, a lever connected to and movable with said spring, an adjustable counterbalance for the load, and mechanism connecting said lever with and adjusting the position of said counterbalance, substantially as specified.

3. In a derriek or crane, a hinged mast, a pivotally-supported boom, mechanism for tying said boom to said mast, a counter-beam, mechanism fortying said counter-beam to said mast, a counterbalance movable on said beam, and automatic mechanism for adjusting the position of said counterbalance, substantially as specified.

4. In a derrick or crane, a mast, a boom having a swiveled support providing universal movement therefor, mechanism for tying said boom to said mast, a swiveled connection between said tying mechanism and mast, and an adjustable counterbalancing mechanism connected with said mast, substantially as specified.

5. In a derrick or crane, a mast, a pivoted bearing carried thereby,apivotally-supported boom, a tension member and a spring conneeting said boom and pivoted bearing, an adi j ustable counterbal ance and mechanism operated by the stress in said tension member for adjusting said counterbalanee, substantially as specified.

G. In a derrick or crane, a counter-beam, a counterweight movable on said beam, a movable belt connected with and moving said counterweight, a mast connected with said beam, a boom connected with said mast, and mechanism actuated by the load carried by said boom for operating said belt and weight, substantially as specified.

7. In a derrick or crane, a car having ways thereon, a mast carried by and movable on said ways, a boom connected with said mast, and a counterbalance connected with said mast, substantially as specified.

8. In a derrick or crane, a car having ways thereon, a folding mast connected with said ways and rolling upon said car, a sectional boom connected with said mast, a beam earried by said mast, and a counterweight movable on said beam, substantially as specified.

9. In a derrick or crane, a car having longitudinal ways thereon, and hoisting mechanism carried by and movable on said Ways, said hoisting mechanism comprising a boom and an adjustable counterbalance, substantially as specified.

In testimony whereof I have hereunto set my hand, this 18th (lay of April, A. D. 1903, in the presence of thesubscribing witnesses.

' JAMES L. DE VOU.

Vitnesses:

JOHN THIEL, UTLEY E. CRANE, Jr. 

